Balanced Operation of a Three-phase Self-excited Induction Generator Supplying a Single-phase Load
博士 === 國立雲林科技大學 === 工程科技研究所博士班 === 101 === When a three-phase induction generator (IG) supplies unbalanced loads, its terminal voltages and line currents are also unbalanced, which may cause the IG to overheat and need to be derated. A single-phase loaded self-excited induction generator (SEIG) work...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2013
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| Online Access: | http://ndltd.ncl.edu.tw/handle/32699396242487093819 |
| Summary: | 博士 === 國立雲林科技大學 === 工程科技研究所博士班 === 101 === When a three-phase induction generator (IG) supplies unbalanced loads, its terminal voltages and line currents are also unbalanced, which may cause the IG to overheat and need to be derated. A single-phase loaded self-excited induction generator (SEIG) works under most unfavorable load unbalance conditions. This thesis proposes a three-capacitor circuit scheme and a method to find the values of the self-excitation capacitors that allow the SEIG to be balanced. The SEIG is modeled by a two-port network equivalent circuit that resolves the SEIG into its positive- and negative-sequence circuits associated with the self-excitation capacitors and the load. Successful results for balancing the SEIG supplying a single-phase load have been achieved by properly choosing the values of the excitation capacitors. With the aid of EMTP /ATP-Draw, the dynamic characteristic of the SEIG supplying a single-phase load is simulated the calculated and simulated results are in good agreement with each other. Finally, experimental results carried out using a 0.5 hp SEIG confirm the feasibility and validity of the theoretical modeling and EMTP /ATP-Draw simulation.
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